'It was a difficult situation, there's no doubt about that,' Horowitz told ET.
Before that awkward moment, Legend delivered a whimsical rendition of 'City of Stars' and 'Audition.'
The two were nominated for Best Actor at the Academy Awards.
From emotional speeches to surprising upsets, here are the Academy Awards moments you'll be talking about tomorrow!
From classic black dresses to gals in gold, ET breaks down the most memorable red carpet looks from the 89th Annual Academy Awards.
When you have Meryl's vote of approval, you've already won!
Jennifer Aniston rocks a daring dress at the Oscars.
'La La Land' didn't win the Oscars' biggest award -- 'Moonlight' did. Here's what went wrong.
After supporting actor and screenplay wins, Barry Jenkins' sophomore directorial effort took home the Academy's biggest award.
Jimmy Kimmel unleashed a new batch of Mean Tweets with an Oscars-themed twist!
Find out who finally took home the coveted Academy Awards statuettes on Feb. 26.
Rogen paid tribute to 'Back to the Future' as one of his favorite films.
Jennifer Aniston presented the moving tribute, and got emotional as she remembered the late Bill Paxton, who died one day before the show.
Affleck began his speech by thanking fellow nominee Denzel Washington.
